Patent GB-948744-A (GB)
Title: Methods for producing oxidatively active compositions and for treating flour therewith
IPC: A21D2/20
Filed: 1960-06-23
Abstract: To oxidatively bleach and/or mature flour, such as wheat flour, it is blended with a small amount, e.g. equivalent to 0.003% of hydrogen peroxide based on the weight of flour, of a liquid reaction product comprising at least one acyclic acetone peroxide, which product is substantially free from solid cyclic acetone peroxides and is soluble in water but substantially insoluble in a liquid hydrocarbon having a low boiling point, such as hexane or pentane. The product is obtained by reacting acetone with aqueous hydrogen peroxide, e.g. in the presence of up to 2%, by weight of the reactants, of an acid catalyst (which may be an acid salt), at a temperature ranging from the boiling point of the mixed reactants to 4 DEG C., removing hydrocarbon-soluble reaction products by extraction with said hydrocarbon and separating the extract from the aqueous fraction. Watersoluble acyclic acetone peroxide or peroxides may be isolated from said aqueous fraction by extracting it with ethyl ether and removing ether from the extract.  The aqueous fraction or the isolated acyclic acetone peroxide or peroxides, e.g. mixed with an edible powdered solid or liquid carrier, may be blended with the flour. Specified solid carriers are: calcium sulphate, starch, heat-modified starch, dextrin, wheat flour, wheat gluten and soybean protein. Specified liquid carriers are paraffin and dibutyl phthalate. Bis-(1, 11-hydroperoxy 1, 11-methyl) diethyl peroxide may be isolated from the hydrocarbon extract.  Specification 948,741 is referred to.ALSO:To oxidatively bleach and/or mature flour, such as wheat flour, it is blended with a small amount, e.g. equivalent to 0.003% of hydrogen peroxide based on the weight of the flour, of a liquid reaction product comprising at least one acyclic acetone peroxide, which product is substantially free from solid cyclic acetone peroxides and is soluble in water but substantially insoluble in a liquid hydrocarbon having a low boiling point, such as hexane or pentane.  The product is obtained by reacting acetone with aqueous hydrogen peroxide, e.g. in the presence of up to 2%, by weight of the reactants, of an acid catalyst (which may be an acid salt), at a temperature ranging from the boiling point of the mixed reactants to 4 DEG C., removing hydrocarbon-soluble reaction products by extraction with said hydrocarbon and separating the extract from the aqueous faction.  Water-soluble acyclic acetone peroxide or peroxides may be isolated from said aqueous fraction by extracting it with ethyl ether and removing ether from the extract.  The aqueous fraction or the isolated acyclic acetone peroxide or peroxides, e.g. mixed with an edible powdered solid or liquid carrier, may be blended with the flour.  Specified solid carriers are: calcium sulphate, starch, heat-modified starch, dextrin, wheat flour, wheat gluten and soybean protein. Specified liquid carriers are paraffin and dibutyl phthalate. Bis-(1,11-hydroperoxy 1, 11 methyl) diethyl peroxide may be isolated from the hydrocarbon extract.  Specification 948,741 is referred to.